Golf ball marker



FIG. 1 is a top plan view of a golf ball marker showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a right-side elevational view thereof, it being understood that the left-side elevational view appears in mirror image to that illustrated;

FIG. 4 is a front elevational view thereof; and,

FIG. 5 is a rear elevational view thereof. 

The ornamental design for a golf ball marker, as shown and described. 